Anthracite-burning grate for furnaces.



W. MGCLAVE.

ANTHRACITE BURNING GRATE FOR FURNACES.

APPLICATION FILED MAR.21. 1913. 1,105,572. Patented July 28, 1914.

3 SHEETS-SHEET 1.

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W. MUCLAVE.

ANTHRACITE BURNING GRATE FOR PURNACES.

APPLICATION FILED MAR.21,1913.

Patented July 28, 1914.

3 SKBBTSMSHEET il,

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W. JMCCLAVE.

ANTHRACITE BURNING GRATB FOR FURNAOES.

APPLIGATION FILED MAR.21.1913.

1,1 05,572, Patented July 28,1914.

3 BHEBTS-SHEET 3.

THE NORRIS PETRS CD.. PHOTOLITH() WHINGTDN l is a detail section on anenlarged scale WILLIAM' MCCLAVE, OF SCRANTON, PENNSYIVVANIA-,MASSIGNOR`'FO MOCLAVEBROOKS COMPANY, OF SCRANTON, PENNSYLVANIA', ACORPORATION 0FPENNSYLVANIA;

ANTHRACITE-BURNING GRAT FOR F'IJATAGES.`

Specification o`f Letters Patent;

Patented July 281, 1914.

Application filed March 2l, 1913. Serial No.` 7555939.`

To all'whom 'it may concern Be it known that LVILLIMI MCCLAVE, a'citizenof the United States, andresidenti of Scranton, in the county ofLackaivannaf andi State of Pennsylvania, have invented certain new anduseful Improvements in Anthracite-Burning Gratos for Furnaces;` and I dohereby declare the following tolbe a full, clear, and exact descriptionof the same, reference being had to the accompanying drawings, formingpart of this specification, and to the figures and letters of referencemarkedl thereon.

Many attempts have been made to produce a furnace grate for burning thefiner gradesl of anthracite coal and the presentl invention is designedto overcome certainldefects foundl to exist in the grates heretoforeconstructed,- and to accomplish certain desirableobjects,v as willhereinafter appear, and incidental* both tothe manufacture of the gratesand to the operation of the same.

Inthe accompanying draWings,-Fignre l is-a sectional view, in a verticalplane fromfront to rear, of a grate embodying the present improvements.Fig. 2 is a top plan view ofthe dumping sections andbearer bars for thesame, shown in Fig. l, the caps being` omitted from two oft thesections. Fig'. 3 show-` ingone of the dumping sections. Fig. 4 is atopplan View of the fourlcap pieces shown in section in Fig. 3. Fig. 5 isan elevationi of a portion of one of the dumping sections. Fig. 6 is adetail section' of a portion ofthe l dumping' section on substantiallythe line l 6--6 ofFig'. 3, this View also showing one half of" one offthe bearer bars.

Like letters of reference inthe several figures indicate the sameparts.y

The grate of the present invention, like grates heretofore constructed.,is composed of' l a series of pivoted sections journ'aled in bearer barssuch as indicated in Figs. land 2 by the letter A, said' bearer barsbeing in turn supported from the setting and Walls* of the furnace. y

Each dumping section of the grate `of the present invention is madelarge as compared Withl sections ofl grate's as heretofore'con` structedand each section comprises a rigid frame formed by "a plurality ofsocketed bars i arranged parallel toeachotlierand longitudinally of the"axis on which" the section K turns, said ybars seing @cassetta attiraitsnes i cepti`on of relatively small caps, each independent of thepractically uniforui admission 'o a maximum area of.ex'tendllig'sooketbtl liars fpieces B by suitable' endy pieces. Eachend piece i's provided with a journal` adapted to talea bearing inthebearer bars; The socltet'ed bars of' thesectionsare adapted forther'eothcis' kbut so constructed'and arranged as 'to rovide'fbr a yairthrougharea and also to provide smooth fuel bearing'surface'over whichthe tools and implements for manipulating the fuel on'tlie grate may bediiagged without liability of" catching. Owing to the individually smallareas of each of the fuel bearing caps, the evils and diflcultiesheretofore encountered because of tlicgrowtli of the metalarepraetically eliminated. i

As shown in the drawings, cach ufl the out the Whole'grate dumping'sections embodies longitfudinallfv` B` connected by end andilt'eri'netliatebrace pieces B2, the Wholeconstituting arigdgridlor"framework which] may lie'proporlioned to Withsl'and all thestrains to which the section ymay be subjected iiinse and at the sainetime be made relatively light so as toecono- Lmize in the iveiglitof thematerial used, as well as to facilitate" tlie' handling andmauiplilation of tlie section. Each"A section preferably has four ofthe' socketed bars B and is tlicrcfbre of considerable width, in

actual practice preferably about eighteen inches, audzeach of theend'pieces B is providcd'with a jmirnaled projection 7) adapted to seatin bearings in the bearer bars A, all as will' be best umlerstood byreference to the left hand portion of Fig; 2, `Where -tivoof thesections are shoivnwitli the fuel bearing caps removed. v

Tlie sockets shown at C in Fig. 2` are elongated'longitudinally oftheliars B and are adaptedfortlie reception of'flat. Shanks (l of fuelbearing' caps D, the caps being held til-miv in place by Wrought ironprojections rl which-are bent over on the under side of the bars B inthe Well understood manner. y Y

The flielbearingface of each of thecaps preferably rectangular, as shownin the enlarged view, Fig. 4 and at the right handside orang. e, and @miSeesen is provides 'with relatively narrow slots i, or Iopenirigs forthe passageof' air through the cabs to siiply theneeessarv eaygen for'cantieristica 'il fuel bearing caps are separated from each other` byspaces which are preferably only as wide as the slots or openings beforereferred to, the whole area of the air openings in the fuel supportingsurface being a relatively small percentage of the total area, butuniformly distributed in the same. As shown, the right hand cap in Figs.3 and L and the two intermediate caps are provided with edge slots Edirectly facing the unbroken edges of the adjacent caps and withopenings ld.. which do not extend to the edges of the caps in eitherdirection. The left hand cap shown in the two figures mentionedconstitutes one of the edge caps of the dumping section and inasmuch asit is not desirable to have edge slots extending into a free space, orinto spaces between the caps in proximity to other edge slots, this capis provided with openings E2 .in-

stead of edge slots corresponding to the slotsl E. @ne edge of each ofthe adjacent caps extending longitudinally of the dumping sections isprovided with edge slots F best seen in Figs. 2 and a, from whichconstruction it follows that each of the spaces between caps has openinginto it edge slots through the caps on one side but in no space willthere be found oppositely disposed edge slots, thus providing for amaximum fuell supporting surface with the admission openings for the airnarrow and so distributed that no portion of the fuel resting on thesurface will be prevented from receiving all of the oxygen necessary forcomplete Combustion. The narrow edge slots and openings prevent theescape of fuel before the same is reduced by combustion to fine ashesand the dumping sections provide a ready means whereby cinders andclinkers may be discharged.

It will be understood especially from an inspection of Figs. 3, 5 and 6that the edge slots and intermediate elongated openings in each of thecap sections flare downwardly, whereby the lodgment of any ashes whichwill pass through the top of the slots and openings is effectuallyprevented.

The desired construction of fuel bearing surfaces for each of thedumping sections rremoves the fire sufliciently far from the bars of thesection frames to prevent in- `jurious action of heat and combustion onsaid bars and the fuel bearing caps which are. subjected to the mostinjurious action of the fire are individually small, thus preventingdistortion by the cumulative effect of the growth of the iron when inlong connected sections and each of said caps may be readily removed andrenewed should the same become broken or worn out in use.

rfhe particular shape of the edgesv of the outside caps of each sectionis better illustrated in Figs. l and 3 and is designed to prevent theeect of growth tending to cause the sections to become inclined byreason of their overlapping edges striking each other and also toprevent interference with the hoe or implements used in manipulating thefuel onl the grate. rflic particular shapes adopted, however, are notnow novel having been embodied in patents heretofore granted to me, butare advantageous even where the injurious effect of growth of the metalis slight, as in the grate of the present invention, for the levelposition of the sections is assured and the escape of any unconsumedfuel between the sections is prevented because of the fact that thesections may be brought into suoli close proximity and one may slightlyoverlap the other without causing difficulties in eitherthe manufactureor the use of the grate.

The frame of each dumping section is preferably provided with adownwardly extending arm fl to which the links l and control rods d arepivotally connected as has heretofore been proposed in grates of hiskind, but it will be understood that any suitable means may be providedfor manipulating the dumping sections in accordance with known practice.

Having thus described my invention, what l claim and desire to secure byLetters Patent of the United States is,-

1. ln a grate for burning fine fuel, the combination with the bearerbars, of dumping sections journaled in the bearer bars and eachembodying a plurality of socket-ed bars extending longitudinally of theaxis of the section, each socketed bar having mounted therein a seriesof independent fuel bearing caps, said caps being rigidly supported infixed relation to each other throughout the entiresection and eachhaving therein a plurality of elongated air admission openings and alplurality of elonlgated edge slots extending through the fuel bearingsurface.

2. ln a grate for fine fuel, the combination with the bearer bars, ofdumping sections journaled in said bearer bars and each sectioncomprising a rigid frame formed by a plurality of longitudinallyarranged socketed bars rigidly connected by end pieces carrying` thejournals for the section, each of said socketed bars having mountedtherein a series of independent rectangular fuel bearing` caps locatedabove the frame and each held rigidly with relation to all of the othercaps of the section, each cap having elongated downwardly flaring airadmission openings therein and elongated downwardly flaring airadmission edge slots, the edge slots of each section being arrangedopposite an unbroken edge of the adjacent section.

3. ln a grate for burning fine fuel, the combination with the bearerbars, of dumping sections journaled in said bars, each sectioncomprising a rigid frame formed by a series of longitudinally extendingparallel bars each having4 a. series of elongated socle eteI therein andend pieces carrying journals en which the section is supported, each ofsaid soeketed bars having rigidly mounted therein a series ofsubstantially rectangular fuel bearing caps having' edge slots andelongated air admission openings, said sections being spaced apart adistance substantially equal t0 the Width of the slots and openings andsaid slots and, openings being distributed uniformly throughout thewhole `grate area, whereby air is admitted uniformly t0 all lportions ofthe fuel carried by the grate.

il. In a grate for burning fine fuel, a pivoted dumping` sectionComprising a rigid frame formed by a series of parallel bars each havinga series of equally spaced elongated socket openings therein and an1ultiplieity of fue] bearing- Caps having flattened `Shanks seating insaid socket openings, each of said fuel bearingcaps being substantiallyrectangular on its fuel bearing' face and each having' elongated airadmission openings extending through said face, the edges of each cap inproximity to the edge of an adjacent cap in the section being' providedwith air admission slots, whereby the air entrance openings areuniformly distributed without material reduction in the fuel supportingsurface and the cumulative ei'l'eet of edge growth in the sections isobviated.

WILLIAM MCCLAVE.

Witnesses:

ALEXANDER S. STEUART, THOMAS DURANT.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

